staging: dgrp: check return value of alloc_tty_driver (178e485a) · Commits · 戴 / test

alloc_tty_driver was always assumed to succeed. Add code to check the return value and return -ENOMEM if alloc_tty_driver fails. Reported-by:

drivers/staging/dgrp/dgrp_tty.c

+9 −0

Original line number	Diff line number	Diff line
		@@ -3173,6 +3173,9 @@ dgrp_tty_init(struct nd_struct *nd)
		*/

		nd->nd_serial_ttdriver = alloc_tty_driver(CHAN_MAX);
		if (!nd->nd_serial_ttdriver)
		return -ENOMEM;

		sprintf(nd->nd_serial_name, "tty_dgrp_%s_", id);

		nd->nd_serial_ttdriver->owner = THIS_MODULE;
		@@ -3232,6 +3235,9 @@ dgrp_tty_init(struct nd_struct *nd)
		}

		nd->nd_callout_ttdriver = alloc_tty_driver(CHAN_MAX);
		if (!nd->nd_callout_ttdriver)
		return -ENOMEM;

		sprintf(nd->nd_callout_name, "cu_dgrp_%s_", id);

		nd->nd_callout_ttdriver->owner = THIS_MODULE;
		@@ -3269,6 +3275,9 @@ dgrp_tty_init(struct nd_struct *nd)


		nd->nd_xprint_ttdriver = alloc_tty_driver(CHAN_MAX);
		if (!nd->nd_xprint_ttdriver)
		return -ENOMEM;

		sprintf(nd->nd_xprint_name, "pr_dgrp_%s_", id);

		nd->nd_xprint_ttdriver->owner = THIS_MODULE;